Improve inspector button perf

[BTMuli]

When I click the inspector button(on the right),it could make me easily to see the div and its component,but I couldn't cancel the select status until I click someone component

I think click again to disactive the inspector button is a natural func.

And when I click down,it opens VSCode while I use IDEA Ultimate,looks wired,doesn't it?

[duowb]

@webfansplz Can we modify the style of the inspector button? Default gray, indicating that no element has been selected yet. After clicking, the color will be highlighted, indicating that the element can be selected. Click to reverse again.

[alexzhang1030]

You can press escape to cancel the inspecting state.